Guruson and GuruMaster (The Blue Tri)

Dinoids are NOT the only type of robotic lifeforms inhabiting their own planet; they also have branch off relatives that are based off of other prehistoric animals as well, but as a whole, they're often categorized as Dinoids just for simplicity's sake. Mainly because the only real differing factors are the fact their appearances and species are based off of something that for the most part are not reptiles (Although exceptions exist even then). As a whole, these Dinoid subspecies tend to be frowned upon by the Dinosaur, Flying and Marine Reptile Type Dinoids, as they are not exactly commonplace compared to those three types of Dinoids. However, due to their rarity, it didn't take too long until a mysterious company known as "Shiramu Inc." emerged and created artificial Dinoids of their own, with Elasmoblades being an early prototype. This company is where the Ultimorian Dinoids originate from, and Shiramu Inc., in Season 1, is not all that important other than providing background for Elasmoblades's existence.

With GuruSaber and another Mammal based Dinoid called UrsaMajor, these two Dinoids are noted as being completely loyal to humankind rather than other Dinoids, so when they were unleashed on the Dinoid homeworld, they caused mass devastation and even showcased the ability to no sell most of Elasmoblades's own attacks to where Elasmoblades was insignificant to them. Elasmoblades is actually a WEAKER tier than GuruSaber and UrsaMajor. When transformed into their master modes, GuruMaster and UrsaMaster completely wrecked Elasmoblades's remaining reputation from early Season 2, and then the final nail on the coffin is the newly revived Tyrannox killing her off for good when he returns to the Dinoid homeworld. As for GuruSaber and UrsaMajor, they both perish at the hands of Tyrannox through an indirect attack against their current location.

Now on Earth, their powers wind up being channeled from an event 11 years ago, and thus wind up in the hands of two humans, and are not discovered until present day when two humans, husband and wife, claim their powers for their own to utilize, and thus Guruson and Ursason are born, and along with that, their ability to utilize their own Master Modes in the form of GuruMaster and UrsaMaster.

In regards to the animals they're based on, GuruMaster is based off of a Dire Wolf, while UrsaMaster is based off of an Arctodus ("Short Faced Bear" or "Cave Bear"). Although GuruSaber looks Ice based, it's actually Water Based, whereas UrsaMajor is Earth element by comparison.

Also as to who their human partners are, well, I'll either let you figure that out on your own based on the hints I've provided, or keep you all waiting until Season 2 has these two debut in action.